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First to theorize that atoms were specific to material. Atoms were different in shape and size. Constant motion, and stuck to each other. Divided a seashell to theorize how small matter could be.
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Pioneer of stoichiometry. He showed that matter could change state in a chemical reaction. The total mass remains the same. “Nothing is lost, Nothing is created, everything is transformed.” -
Theorized Atoms were indivisible and indestructible with distinct masses and properties.
Oxygen combined with one or to volumes of nitric oxide in closed vessels over water. -
Discovered electrons and made plum pudding model.
Used Cathode ray tubes to show all atoms contain electrons. -
Discovered radium and podium. Radioactivity originates with the atoms themselves.
Investigated pitchblade to find elements. -
Discovered that atoms contain a nucleus much smaller than the atom.
Gold foil experiment particles shot at gold foil show most passed through some didn’t. -
Introduced the quantum theory explains the behavior of matter and energy. -
Used equations and math to prove the atoms' existence.
Used mostly math to experiment with atoms equations and theories to prove things happen without experimenting directly. -
Discovered the accurate charge of an electron.
Used falling drop method: Small electrically charged drops of oil were suspended between two metal plates where they were subjected to the downward force of gravity and the upward attraction of an electrical field. -
Bohr model, and discovered some physicals values only take discrete values.
Nuclear fission splitting nucleus of atom to experiment. -
Waves can be used the same way as particles.
Streams of electrons reflected against crystals and spread through metal foils. -
Made a type of quantum mechanics based on matrices. Set limits for particles.
Gamma ray microscope illumination would cause the electron to move. -
Wave equation calculates the energy of electrons.
Schrodingers cat experiment hypothesized that atoms are in decay and non decay until it is observed. -
Discovered Neutron.
Shot alpha particles at beryllium producing what he called neutrons.
